Fluid filter



FIG. 1 is a perspective view of the fluid filter inventive design thereof;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a front elevation view thereof; and,

FIG. 7 is a rear elevation view thereof.

The broken line showing is included for the purpose of illustrating and forms no part of the claimed design. 

The ornamental design for a fluid filter, as shown and described. 